input_filepath="roots-icon.png"
output_iconset_name="Roots.iconset"

mkdir $output_iconset_name

sips -z 16 16    $input_filepath --out "${output_iconset_name}/icon_16x16.png"
sips -z 32 32    $input_filepath --out "${output_iconset_name}/icon_16x16@2x.png"
sips -z 32 32    $input_filepath --out "${output_iconset_name}/icon_32x32.png"
sips -z 64 64    $input_filepath --out "${output_iconset_name}/icon_32x32@2x.png"
sips -z 128 128  $input_filepath --out "${output_iconset_name}/icon_128x128.png"
sips -z 256 256  $input_filepath --out "${output_iconset_name}/icon_128x128@2x.png"
sips -z 256 256  $input_filepath --out "${output_iconset_name}/icon_256x256.png"
sips -z 512 512  $input_filepath --out "${output_iconset_name}/icon_256x256@2x.png"
sips -z 512 512  $input_filepath --out "${output_iconset_name}/icon_512x512.png"

iconutil -c icns $output_iconset_name

cp -f Roots.icns Terminal.icns
